#include <Wire.h>
#include <LiquidCrystal_I2C.h>

// Inisialisasi LCD dengan alamat I2C berbeda
LiquidCrystal_I2C lcd1(0x27, 16, 2);
LiquidCrystal_I2C lcd2(0x26, 16, 2);
LiquidCrystal_I2C lcd3(0x25, 16, 2);
LiquidCrystal_I2C lcd4(0x24, 16, 2);

// Pin LED
const int redPin = 12;
const int yellowPin = 27;
const int greenPin = 26;

void setup() {
  // Inisialisasi LCD
  lcd1.init();
  lcd1.backlight();
  lcd2.init();
  lcd2.backlight();
  lcd3.init();
  lcd3.backlight();
  lcd4.init();
  lcd4.backlight();

  // Inisialisasi pin LED
  pinMode(redPin, OUTPUT);
  pinMode(yellowPin, OUTPUT);
  pinMode(greenPin, OUTPUT);

  // Tampilkan pesan awal
  lcd1.setCursor(0, 0);
  lcd1.print("Traffic Light 1");
  lcd2.setCursor(0, 0);
  lcd2.print("Traffic Light 2");
  lcd3.setCursor(0, 0);
  lcd3.print("Traffic Light 3");
  lcd4.setCursor(0, 0);
  lcd4.print("Traffic Light 4");
  delay(2000);
}

void loop() {
  // Siklus lampu lalu lintas
  updateTrafficLight(&lcd1, "Green");
  delay(10000);
  updateTrafficLight(&lcd1, "Yellow");
  delay(3000);
  updateTrafficLight(&lcd1, "Red");

  updateTrafficLight(&lcd2, "Green");
  delay(10000);
  updateTrafficLight(&lcd2, "Yellow");
  delay(3000);
  updateTrafficLight(&lcd2, "Red");

  updateTrafficLight(&lcd3, "Green");
  delay(10000);
  updateTrafficLight(&lcd3, "Yellow");
  delay(3000);
  updateTrafficLight(&lcd3, "Red");

  updateTrafficLight(&lcd4, "Green");
  delay(10000);
  updateTrafficLight(&lcd4, "Yellow");
  delay(3000);
  updateTrafficLight(&lcd4, "Red");
}

// Fungsi untuk memperbarui status LCD dan LED
void updateTrafficLight(LiquidCrystal_I2C *lcd, String color) {
  lcd->clear();
  lcd->setCursor(0, 0);
  lcd->print("Status: ");
  lcd->setCursor(0, 1);
  lcd->print(color);

  // Update LED
  if (color == "Green") {
    digitalWrite(redPin, LOW);
    digitalWrite(yellowPin, LOW);
    digitalWrite(greenPin, HIGH);
  } else if (color == "Yellow") {
    digitalWrite(redPin, LOW);
    digitalWrite(yellowPin, HIGH);
    digitalWrite(greenPin, LOW);
  } else if (color == "Red") {
    digitalWrite(redPin, HIGH);
    digitalWrite(yellowPin, LOW);
    digitalWrite(greenPin, LOW);
  }
}